sorry - please rephrase ;) I don't understand the question.
In the example numberguess there is pageflow.jpdl.xml, its version is before 3.1.x. When I open pageflow.jpdl.xml, the seam graphical pageflow designer convert it.
But I can't see the graph in mode diagram.
ps.: sorry for my bad english
I have the same result - no diagram in the editor.